History Fridge / Coherence

* Even though nothing bad happens in the happy house that Emily finds (apart from her attempted murder), all of the bad things that were uncovered in the other houses are still lurking under the surface. Emily's dancing career has stalled out. Kevin and Laurie still hold candles for each other even though they're dating other people. Beth still cheated on her husband and never came clean. Mike still has a drinking problem that ruined his career and is affecting his marriage.

** And the second-best one seems to involve all of them always wandering together. Note that after the first unambiguous travel to another universe - one involving the broken glass - they all still seem to be on the same page, wondering about the glass and being aware that the two absent guys are meant to be back in 5 minutes. Looks like the effect doesn't set apart those who don't split on their own.
* Earlier in the movie, Mike mentions being in "Roswell" for four seasons. Laurie says she's a fan, asks him which episode. Mike says he was in every episode, but Laurie can't remember him. This is a very early sign of the comet's effect.
** It's still not clear what, other than sheer chance, could induce her not to remember Mike in the series she'd herself watched (assuming she was telling the truth the whole time - and if not, then it might be totally unrelated to the effect anyway). [[FridgeHorror Unless the effect had actually begun much, much earlier than the comet...]]
* The ''only'' thing that's different between realities is the unfolding of the ultimately not-so-fateful events over just a few hours. Really, what's so horrible about "being stuck in another reality" in this case?

* Imagining what might happen to Emily in the new universe leads to some very horrifying possibilities. She's probably about to be arrested for attempted murder so the real question is whether or not anyone believes she's from another reality. If they don't, she's going to prison and if she ever gets out she'll be homeless without anything to her name. If they do, the government is probably going to want to study her, and given she's a violent criminal not very many people are going to be rushing to stop them from locking her away forever for whatever tests they want to conduct.

* Imagining what might happen to Emily in the new universe leads to some very horrifying possibilities. She's probably about to be arrested for attempted murder so the real question is whether or not anyone believes she's from another reality. If they don't, she's going to prison and if she ever gets out she'll be homeless without anything to her name. If they do, the government is probably going to want to study her and as a violent criminal not very many people are going to be rushing to stop them from locking her away forever for whatever tests they want to conduct.

** It's still not clear what, other than sheer chance, could induce her not to remember Mike in the series she'd herself watched (assuming she was telling the truth). [[FridgeHorror Unless the effect had actually begun much, much earlier than the comet...]]

** It's still not clear what, other than sheer chance, could induce her not to have remembered Mike. [[FridgeHorror Unless the effect had actually begun much, much earlier than the comet...]]

* The movie only shows us how the people in one house handled the comet's passing but there is no reason to believe they were the only ones affected. There are presumably many other houses on that street that were directly beneath it and probably several adjacent streets that are equally as populated, since it doesn't appear to be a rural area. Once you multiply that population across the different realities it suddenly becomes very likely that countless thousands of

* The movie only shows us how the people in one house handled the comet's passing but there is no reason to believe they were the only ones affected. There are presumably many other houses on that street that were directly beneath it and probably several adjacent streets that are equally as populated, since it doesn't appear to be a rural area. Once you multiply that population across the different realities it suddenly becomes very likely that countless thousands of lives were changed by the event, mostly for the worse.
** One FreezeFrameBonus has a character doing the math on a calculator, concluding that there are well over 5 ''million'' different realities.
* How does the comet's influence "know" what a house is and where the property ends? Is the effect a cylinder that just happened to be centered upon the house in that one instance? Are there other instances with less clean borders? What happens when a house is split by two different zones with people on either side, would they just vanish from each other's view with the dark space cutting through the building? Are there patches of forest with terrified deer staring out into the infinite blackness suddenly surrounding them? Why does the space between the parallel houses resemble a street? Obviously the answer to all of these is "because it's a movie" but in-universe it's certainly very difficult to figure out what the rules might be.
* Not quite "fridge" since it's immediately quite obvious that things are about to get bad for Emily, but imagining what might happen to her in the new universe leads to some very horrifying possibilities. She's probably about to be arrested for attempted murder so the real question is whether or not anyone believes she's from another reality. If they don't, she's going to prison and if she ever gets out she'll be homeless without anything to her name. If they do, the government is probably going to want to study her and as a violent criminal not very many people are going to be rushing to stop them from locking her away forever for whatever tests they want to conduct.

** One freezeframe has a character doing the math on a calculator, concluding that there are well over 5 ''million'' different realities.

* When arguing about what to do, one of the characters responds to a suggestion that they all just stay in the house as unrealistic and unhelpful. When Em finally finds a "happy" reality, everyone has actually just stayed inside. Turns out that was a pretty good solution.

* Earlier in the movie, Mike mentions being in "Roswell" for four seasons. Laurie says she's a fan, asks him which episode. Mike says he was in every episode, but Laurie can't remember him. This is a very early sign of the comet's effect.

* When arguing about what to do, one of the characters responds to a suggestion that they all just stay in the house as unrealistic and unhelpful. When Em finally finds a "happy" reality, everyone has actually just stayed inside. Turns out that was a pretty good solution.

!!The multiversal anomalies started before the power outage.
At one point, Laurie asks Mike what he does, and Mike responds that he's an actor who had a recurring role in the popular 1990s teen paranormal drama ''Series/{{Roswell}}''. Now, this is obviously a little in-joke about the fact that Nicholas Brendon, who plays Mike, was ''actually'' a regular in [[Series/BuffyTheVampireSlayer a certain other popular 1990s teen paranormal drama]] -- except that Laurie goes on to comment in astonishment that she used to love watching that show, but doesn't remember Mike's character being in there at all. Note also that the sudden cuts to black (hinted to be switches between different realities) start before the power outage that kicks off the bulk of the drama -- and that all of the characters arriving at the dinner party arrive at different times. Perhaps they all come from slightly different realities, and "Prime" Laurie actually comes from a world where Mike really ''wasn't'' in ''Roswell''...